A 57 70 66 27 3 65 15 86 64 49 11 16 34 57 61 29 26 73 10 45 71 11 98 12 43 46 13 64 88 14 19 22 15 14 53 16 14 59 17 11 94 18 34 18 19 68 68 20 39 62 B. 2.
Here is a link to a data set concerning treatment groups A and B.
Before performing a t-test to determine if the two groups are different, researchers must first ascertain if the variance in the two groups is the same using an F test.
Indicate whether the hypothesis below is the null or alternate hypothesis for the F test.
The variance in group A is equal to the variance in group B
Calculate the F statistic for this data set and report it in the box below, rounded to two decimal places.
Use the formula =(1-(f.dist(F, df1,df2,true) in Excel to calculate the P value for the F statistic, and report it in the box below. Do not use the rounded value for F when calculating the P value. Use the value in the spreadsheet that has not been rounded.
Based on this p value, would you recommend using a Student's t test or a Welch's t test to determine if the two treatment groups have different means? Enter either Student's or Welch's in the box below.
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